Compare and see the performance impact of your team’s work without leaving GitHub.
Change conditions that Calibre tests your Sites in—connection speed, devices, test location and more.
Track your progress and introduce accountability by setting budgets against metrics.
Quickly create and share one-off test results with no log-in required.
Receive comprehensive performance overviews directly to your inbox each week.
Leverage the power of a custom-built performance suite, including Google Lighthouse.
Track modern metrics that will have an impact on your search ranking: Largest Contentful Paint, Cumulative Layout Shift and Total Blocking Time.
Understand the impact of external scripts—how it affects your page size and execution time.
Find best or worst performing Pages and benchmark against your competitors.
Test your Sites across 17 global locations to discover where your customers’ experience suffers most.
We offer a lifetime snapshot data retention for all account tiers.
Always be in control of how often your Sites should be tested.
Be confident in your metrics with an AI-powered test verification engine that quickly re-tests results when an anomaly is detected.
Track unlimited Sites and Pages at no extra cost.
See historical performance metric data over up to 6 months.
Block ads and third party resources to establish a performance baseline.
Find out the parse, compile and execution cost of internal and vendor scripts.
Access Pages requiring authentication through cookies, custom headers or form log-ins.
Easily spot when and under which conditions rendering problems occur.
Use fixed IP addresses to ensure requests are securely coming from Calibre.
Dig into downloaded assets and learn how to optimise their delivery.
Download HAR files to understand connectivity and transfer issues.
Automate your performance system with powerful, modern CLI tooling.
Use our npm package to leverage Calibre directly in Node.
Add webhooks to retrieve snapshot data securely through HTTP.
Find out which release affected performance, accessibility or SEO with deployment markers.
We encrypt all of your data at rest in both our databases and file storage.
We comply with the General Data Protection Regulation (GDPR) to ensure you always have control over your data.
Sign up and log in with your Google account on every Plan tier.
Add an extra layer of sign in security and faster onboarding for your organisation with tools like Okta, OneLogin and more.